My 2013 Vitz burns around 0.75 liter of oil at about every 1000 kms. Engine is water dropping and in perfect condition. Due to this issue I have to change the oil after every 3000 kms. I also get grey smoke, not white, not blue, neither black but a grey smoke only when the engine is redlined which I think is due to spark plugs (not changed since the car is bought) . I have changed the PCV valve, though the replaced one is from a Kabuli Vitz engine but that has not fixed the issue. I have thought of installing an oil catch can to see if it solves the oil consumption problem. I have seen quite a few videos on youtube regarding,"how to install an oil catch" but I have some problem,
Which pipe is to be used for the catch can, as there are two of them?
Whereas, this is the smoke out of my tailpipe.